I have 2 competing HVAC design choices. I need help from an experienced HVAC person to help me choose one.

Design choice1:
Floor level cold air distribution. You can see the designs at this link: [obscured] /sh/43nk3ge86w3dogy/g9f4Wwdt7V

Design choice2:
Ceiling level cold air distribution. You can see the designs at this link: [obscured] /sh/4oy6pcaqhan071j/UcSmwY9i82

I personally prefer Floor level cold air distribution since as per this report by Carnegie Mellon University posted at : [obscured] /ebids/images/group/cases/ufa.pdf , cold air coming from floor is more energy efficient. Since cold air is heavier and hot air is lighter.

Do you have experience to consult on this?

I can be reached on skype at "kedia.vikas". I am in Chicago but the building is in Kolkata, India.

Kolkata happens to have hot and humid climate. For more details on kolkata climate please see: [obscured] /wiki/Climate_of_Kolkata...